Building master branch instead of pushed branch

Feedback & Bug Reports
1

When pushing a new commit to a branch, it builds master.

circle.yml:

---

dependencies:
  pre:
    - mkdir -p download
    - test -e download/go1.7.1.linux-amd64.tar.gz || curl -o download/go1.7.1.linux-amd64.tar.gz https://storage.googleapis.com/golang/go1.7.1.linux-amd64.tar.gz
    - sudo rm -rf /usr/local/go
    - sudo tar -C /usr/local -xzf download/go1.7.1.linux-amd64.tar.gz
test:
  override:
    - ${HOME}/.go_workspace/bin/ginkgo -r --randomizeAllSpecs --randomizeSuites --cover --trace --race --progress